Exhaust manifold



Man-mhl 1`0,-l931. E. wALLER i 1,796,132

r EXHAUST MANIFOLD Filed Feb. 27. 1928 @@Mqgwgm.

Patented Mar. 10, 1931 UNITED STATES PATENT OFFICE EINAR WALLER, orDETROIT, MICHIGAN, AssIGNOR To GENERAL MOTORS CORPORA- TION, or DETROIT,MICHIGAN, A CORPORATION or DELAWARE DxRAUsT MANIFOLD Application ledFebruary 27, 1928.

, This invention relates to manifolds used on internal combustionengines and has particular reference to a device for heating thecarbureted fuel mixture before it enters the firing chamber.

Prior heating arrangements have made use of a baffle and a single valveto direct more or less of the hot exhaust gases of the exhaust manifoldsto a spot on the intake manifold or to a riser which extends from thecarburetor past the exhaust manifold to the intake manifold.

It has been customary to direct a portion of the exhaust gases towardthis hot spot or riser, but as far as I am aware no prior constructionhas taken all of the exhaust gases controlled by a plurality of valvesand directed all or a part of them vagainst the riser atk the center ofthe manifolds. With the present arrangement it is possible to directeither half'orl all of the exhaust gases directly against the riser tolcause a preheating.

This .is vof advantage when the outside temperature becomes cooler forat times it is desirable to direct but a lportion, of the exhaustgases-against the riser, while at other times all theexhaust may beutilized.

The object of the invention is accomplished trally longitudinally of theexhaust manifold and which has for its object to conduct away theexhaust gases to the exhaust tube when the valve is across the manifold.The two valves are independently operated and it is accordingly possibleto have one valve across the manifold and the other across the Open ingof the auxiliary passage. The invention is disclosed on the accompanying drawing in which:

Figure 1 shows a side view of an internal combustion engine with the newform manifold and heating arrangement applied'thereto, parts `of theexhaust manifold being shown in section.

yFigure 2 is a plan view of the exhaust man- Serial No. 257,251.

ifold removed from the engine with parts broken away and shown insection.

Y Figure 3 is a section through the intake and exhaust manifold on theline 3 3 of Figures 1 and 2.

Figure 4 is a detail view of a modified form of valve.

kFigure 5 is a sectional yView at right angles to Figure 4 of themodified form adapted Yfor operation from the dash. Referring to Figure1, the numeral 10 designates an yinternal combustion engine as a whole,12 the intake manifold, 14 the exhaust manifold, and 16 the carburetor.The carburetor 16 is connected to the intake manifold 12 by means of ariser 18 which passes through the exhaust manifold 14, as seen fromFigures 2 and 3. The ,riser 1S passes centrally through the exhaustmanifold and is surrounded on all sides by a chamber 20, which has aport 22 at its lower portion which leads to the exhaust pipe 24.

AExtending centrally parallel to the exhaust manifold 14 is a pair ofwalls 26 and 28 forming the auxiliary passage 30 therebetween to conductthe exhaust gases to the exhaust tube 24 when either or both Valves 32or 34 are across the exhaust manifold.

' Positioned in the exhaust manifold at either side of the riser 18 is apair of similar valves 32 and 34 which are capable of beingI turnedeither across the path of the manifold as shown by the valve 32 or inali gmnent with the Wall 26 to close the auxiliary passage 30, as shownby the valve 34.

These valves are adjusted from below as shown in Figure 1, the adjustingmeans comprising a. holding member 35 and the bolts 37 which may bereleased and the valve shifted to its desired position and the boltsretighti fi (l yvalves will be placed in the position ofthe pied by thevalve 32 in Figure 2. During ex- 1 treme cold weather, -or in the winterthe bot-h valve 34 in Figure 2. During seasons `of the year when theweather is intermediate between the extremes of heat and cold,only. one

valve may be lmoved across the exhaust manifold as shown in the positionof the two valves Y in Figure 2.

With both valves across the manifold the exhaust from all the cylinderswill be com'- pel'led to travel through the auxiliary passage 2O and tothe exhaust tube 24, only such gases arriving at the riser 18, as willi-n their natural c-ourse iiow through theport 22 to thechamber 20. Whenone or bothfof the valves 32 and `34is closed,`"it will force eitherhalf or all, .respectively7 of the exhaust gases to impinge directlyagainst theriser 18 and pass from theportv 22 to the exhaust tube 24,giving amuch greater degree ofheating to the carbureted gases "as theypass from the carburetor' 16 to the intake manifold 12 through the riser18.

Referring to the structure shown in Figure 4, it will be seen that as amodification the operation of the valves 32 and 34l may beA controlledfrom the instrument board or other suitable parts of'an automotivevehicle. The valve 34 is shown vas mounted on a stem 36 journalled in alower plate 38 suitably secured to the exhaust manifold and at itsupfperpor- Vtion in a stud portion 40 formed integral with vthe exhaustmanifold 14. rThe'upper portion of the stein 36 isp'rovided with a'pairof washers 42 between which there is confined acoil spring 44. The endof the stem has secured therein a cotter lpin 46 tohold the parts insecured relation. The opposite end of the stem 36`li'as secured thereonan arm 48 having an eye 50 for the application of a suitable linl-:agewhich extends to the instrument board or ydash of the automotive vehicleto which the present invention is intended to be applied.

The function ofthe valves shown in Fig-v ures 4 and 5, is precisely thesame asthat shown in Figures 1 to 3 inclusive, the single differenceresiding in the changed stiucture necessary to adapta' the valve tooperation from the dash.

The various parts aresuitably interconiiected or secured by meansofbolts 52 in a.

v wellknown manner.

The invention is shown as applied to a six cylinder engi-ne, the twomiddle exhaust 4ports 54. and 56 beingsiamesed, however, the inventionis capableofadaptation to an engine of any suitable numherfofcylinders.`

If desired, the vpassage 30 may be lengthened to extendVY past themouths of theexhaust at onel side and only one valve positioned betweenthe two manifold.

I claim:

kports onone side of the 1. In combination with an internalfcoinvbustion engine `:having inta-ke and 'exhaustmanifolds, a riserconnected' t'o'said intake manifold, and a plurality of means in saidvexhaust manifold to direct all or a. part of the exhaust gases againstthe riser. A 2. VThe combination of claim 1, said means comprisingindependently operated valves', the closingV of one valve across theexhaust manifold causing a part of the exhaust gases to impinge directlyagainst the riser, the closing of bothV valves across the exhaustmanifold preventing substantially all of the exhaust gases Vfromimpinging directly against the riser, and' the openingV of both valvesallowing free passage of the gas through the manifold and causingsubstantially all of the exhaust gases to inipinge against the riser.

3. In combination withan internal conibustion engine having' an exhaustmanifold and an intake manifold positionedthereover, a riser froml thecarburetor passing through the exhaust manifold, and a pluralityofindependent Vmeans inl saidk exhaust manifold independently operatedfrom its underside for' controlling therflow of exhaust gases about'said' riser, said means lcapablerof di.v recting all or alpa-rt'of saidgases fromor vto said riser.

i 4. In combination with aninternal 'com-p 'bustion engine having intakeand' exhaust manifolds, arriserfrom the carburetor Ato theV intakemanifold passing through the exhaust manifold, an auxiliary passage inthe exhaust manifold to allow the exhaust gases to be ley-passed awayfrom vdirect contact with the riser, and means forcontrol-ling the flowof the exhaust gases through said passage.

5. The combinationof claim 4, saidv means comprising a plurality ofmembers control- 4;

ling said passage from a plurality of points.

6. The combination of claim 4, saidmeans comprising two valveindependently controlling opposite ends of said passage.

7. The combination of claim 4,'said passage positioned centrallylongitudinally of said `manifold and passing through said exhaust iceics

' extending to opposite sides of said riser, a

port between said passage and exhaust manifold to allow the circulationof exhaust gases to and from said riser, and means for controlling thepassage of exhaust gases through said auxiliary passage.

10. In combination with an induction operated internal combustion enginehaving intake and exhaust manifolds and two valves in said exhaustmanifold for directing the gaseous medium passing therethrough against aportion of the induction system to cause a heating of the engine fuel,one valve positioned at either side of the discharge opening of theexhaust manifold.

11. The combination with an internal combustion engine, having intakeand exhaust manifolds, a riser forming a continuation of said intakemanifold, a pair of valves in the exhaust manifold, one at either sideof said riser, for directing the gaseous medium passing ,through theexhaust manifold against said riser vto cause a heating of the enginefuel.

12. In combination with an internal combustion engine having intake andexhaust manifolds, a riser connected to said intake manifold and passingthrough said exhaust manifold, and a plurality of valves in said exhaustmanifold to direct all or a part of the exhaust gases against the riser.

13. In combination with an internal combustion engine having intake andexhaust manifolds, a riser connected to said intake manifold and passingthrough said exhaust manifold, and two valves positioned at oppositesides of said riser in said exhaust manifold to direct all or a part ofthe cxhaust gases against the riser.

14. In combination with an internal combustion engine having intake andexhaust manifolds, a riser from the carburetor to the intake manifoldassing centrally through the exhaust mani old, an auxiliary passageformed with said exhaust manifold and positioned centrallylongitudinally thereof and extending to opposite sides of said riser, aport between said passage and exhaust manifold to allow the circulationof exhaust gases to and from said riser, and a plurality of valves insaid exhaust manifold for controlling the passage of exhaust gasesthrough said auxiliary passage.

15. In combination with an internal combustion engine having intake andexhaust manifolds, a riser from the carburetor to the intake manifoldpassing centrally through the exhaust manifold, an auxiliary passageformed with said exhaust manifold and positioned centrallylongitudinally thereof and extending to opposite sides of said riser, aport between said passage and exhaust manifold to allow the circulationof exhaust gases to and from said riser, and means for controlling thepassage of exhaust vgases through said auxiliary passage, said meanscomprising a plurality of valves in said exhaust manifold capable ofbeing independently moved to either close said exhaust manifold or toclose said passage.

In testimony whereof I affix my signature.

EINAR VALLER.

